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libakgl/tests/draw.c
Andrew Kesterson 9924d74dcc Namespace every exported symbol, and bump to 0.5.0 
Closes internal-consistency items 1 through 6, 12 and 13. Every include guard
is _AKGL_<FILE>_H_, every in-project header include is angled, and every
exported function, type and global carries the akgl_ prefix. This is an ABI
break; the soname goes to libakgl.so.0.5. TODO.md carries the full rename
table.

The renames were driven by renaming each declaration and letting the compiler
find the uses, not by pattern substitution: renderer, physics and camera are
also parameter and struct-member names, and a sed would have rewritten
map->physics and every akgl_RenderBackend *renderer parameter without a word.

Item 4 turned out not to be cosmetic. The library exported a global called
renderer and tests/character.c defined an SDL_Renderer *renderer of its own;
the executable's definition preempted the library's, akgl_sprite_load_json
read a SDL_Renderer * through an akgl_RenderBackend *, and every texture load
in that suite failed. The suite reported success anyway, because libakerror's
unhandled-error handler ends in exit(errctx->status), exit keeps only the low
byte, and AKGL_ERR_SDL is exactly 256. So character had been green while
running one of its four tests, and every suite in the tree was unable to fail
on the most common status in a library built on SDL.

Both are fixed. tests/testutil.h gains TEST_TRAP_UNHANDLED_ERRORS(), which
collapses any status a byte cannot carry onto 1, and every suite installs it.
character binds a real backend with akgl_render_2d_bind. Its fourth test then
runs for the first time and fails on a defect it has asserted all along, so
akgl_heap_release_character now walks state_sprites with
AKGL_ITERATOR_OP_RELEASE and destroys the property set before zeroing the slot
-- TODO.md Defects item 21 and half of Carried over item 1.

AKGL_TIME_ONESEC_MS said "one second in milliseconds" and held 1000000, so
akgl_game_state_lock waited roughly sixteen minutes rather than one second. It
is AKGL_TIME_ONEMS_NS now, the budget is its own named constant, and
tests/game.c holds the mutex from a second thread to assert the wait -- the
contended path had no coverage at all.

Headers are self-contained and it is enforced: AKGL_PUBLIC_HEADERS drives both
install() and a generated translation unit per header, so a header that ships
is a header that is checked. Writing that found registry.h, which used
SDL_PropertiesID in eight declarations and included no SDL header.

23/23 suites pass, memcheck is clean, reindent --check is clean.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-01 07:33:35 -04:00

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/**
* @file draw.c
* @brief Unit tests for the immediate-mode drawing primitives.
*
* Everything here draws into a small software renderer under the dummy video
* driver and then reads the target back with SDL_RenderReadPixels, so the
* assertions are about pixels that actually changed rather than about SDL
* having been called. No window is shown and no display is required.
*
* The target is deliberately tiny: at 64x64 a full readback is 16 KB, which
* makes it cheap to read the whole thing back after every operation.
*/
#include <SDL3/SDL.h>
#include <string.h>
#include <akerror.h>
#include <akgl/error.h>
#include <akgl/game.h>
#include <akgl/draw.h>
#include <akgl/renderer.h>
#include "testutil.h"
/** @brief Width and height of the offscreen target every test draws into. */
#define TEST_TARGET_SIZE 64
/** @brief Opaque black, what each test clears the target to. */
static const SDL_Color testblack = { 0x00, 0x00, 0x00, 0xff };
/** @brief The color most tests draw with. */
static const SDL_Color testred = { 0xff, 0x00, 0x00, 0xff };
/** @brief A second color, for tests that need to tell two marks apart. */
static const SDL_Color testgreen = { 0x00, 0xff, 0x00, 0xff };
/** @brief Clear the whole target to opaque black. */
static akerr_ErrorContext *clear_target(void)
{
PREPARE_ERROR(errctx);
FAIL_ZERO_RETURN(
errctx,
SDL_SetRenderDrawColor(akgl_renderer->sdl_renderer, 0x00, 0x00, 0x00, 0xff),
AKGL_ERR_SDL,
"%s",
SDL_GetError());
FAIL_ZERO_RETURN(
errctx,
SDL_RenderClear(akgl_renderer->sdl_renderer),
AKGL_ERR_SDL,
"%s",
SDL_GetError());
SUCCEED_RETURN(errctx);
}
/**
* @brief Report whether one pixel of @p shot carries @p color.
*
* Alpha is not compared: the render target's own alpha depends on the format
* SDL picked for it, and none of these tests draw translucently.
*/
static bool pixel_is(SDL_Surface *shot, int x, int y, SDL_Color color)
{
uint8_t r = 0;
uint8_t g = 0;
uint8_t b = 0;
uint8_t a = 0;
if ( shot == NULL ) {
return false;
}
if ( !SDL_ReadSurfacePixel(shot, x, y, &r, &g, &b, &a) ) {
return false;
}
return ((r == color.r) && (g == color.g) && (b == color.b));
}
akerr_ErrorContext *test_draw_point(void)
{
PREPARE_ERROR(errctx);
SDL_Surface *shot = NULL;
ATTEMPT {
CATCH(errctx, clear_target());
TEST_EXPECT_OK(errctx, akgl_draw_point(akgl_renderer, 10.0f, 20.0f, testred),
"plotting one pixel");
shot = SDL_RenderReadPixels(akgl_renderer->sdl_renderer, NULL);
FAIL_ZERO_BREAK(errctx, shot, AKGL_ERR_SDL, "%s", SDL_GetError());
TEST_ASSERT(errctx, pixel_is(shot, 10, 20, testred),
"the plotted pixel at 10,20 is not the color it was drawn with");
TEST_ASSERT(errctx, pixel_is(shot, 11, 20, testblack),
"plotting one pixel also changed its neighbour at 11,20");
TEST_ASSERT(errctx, pixel_is(shot, 10, 21, testblack),
"plotting one pixel also changed the pixel below it");
TEST_EXPECT_STATUS(errctx, AKERR_NULLPOINTER,
akgl_draw_point(NULL, 0.0f, 0.0f, testred),
"plotting through a NULL backend");
} CLEANUP {
if ( shot != NULL ) {
SDL_DestroySurface(shot);
}
} PROCESS(errctx) {
} FINISH(errctx, true);
SUCCEED_RETURN(errctx);
}
akerr_ErrorContext *test_draw_line(void)
{
PREPARE_ERROR(errctx);
SDL_Surface *shot = NULL;
bool onthe_line = true;
int i = 0;
ATTEMPT {
CATCH(errctx, clear_target());
// A vertical line, so every pixel of it is known without reasoning
// about how SDL rasterises a diagonal.
TEST_EXPECT_OK(errctx, akgl_draw_line(akgl_renderer, 5.0f, 4.0f, 5.0f, 12.0f, testred),
"drawing a vertical line");
shot = SDL_RenderReadPixels(akgl_renderer->sdl_renderer, NULL);
FAIL_ZERO_BREAK(errctx, shot, AKGL_ERR_SDL, "%s", SDL_GetError());
for ( i = 4; i <= 12; i++ ) {
TEST_ASSERT_FLAG(onthe_line, pixel_is(shot, 5, i, testred));
}
TEST_ASSERT(errctx, onthe_line == true,
"the vertical line from 5,4 to 5,12 has a gap in it");
TEST_ASSERT(errctx, pixel_is(shot, 5, 3, testblack),
"the line ran past its first endpoint");
TEST_ASSERT(errctx, pixel_is(shot, 5, 13, testblack),
"the line ran past its second endpoint");
TEST_ASSERT(errctx, pixel_is(shot, 6, 8, testblack),
"the line is wider than one pixel");
TEST_EXPECT_STATUS(errctx, AKERR_NULLPOINTER,
akgl_draw_line(NULL, 0.0f, 0.0f, 1.0f, 1.0f, testred),
"drawing a line through a NULL backend");
} CLEANUP {
if ( shot != NULL ) {
SDL_DestroySurface(shot);
}
} PROCESS(errctx) {
} FINISH(errctx, true);
SUCCEED_RETURN(errctx);
}
akerr_ErrorContext *test_draw_rects(void)
{
PREPARE_ERROR(errctx);
SDL_Surface *shot = NULL;
SDL_FRect box;
ATTEMPT {
box.x = 8.0f;
box.y = 8.0f;
box.w = 16.0f;
box.h = 16.0f;
// The outline touches the border and leaves the middle alone.
CATCH(errctx, clear_target());
TEST_EXPECT_OK(errctx, akgl_draw_rect(akgl_renderer, &box, testred), "outlining a rectangle");
shot = SDL_RenderReadPixels(akgl_renderer->sdl_renderer, NULL);
FAIL_ZERO_BREAK(errctx, shot, AKGL_ERR_SDL, "%s", SDL_GetError());
TEST_ASSERT(errctx, pixel_is(shot, 8, 8, testred), "the outline is missing its top left corner");
TEST_ASSERT(errctx, pixel_is(shot, 23, 23, testred),
"the outline is missing its bottom right corner");
TEST_ASSERT(errctx, pixel_is(shot, 16, 8, testred), "the outline is missing its top edge");
TEST_ASSERT(errctx, pixel_is(shot, 16, 16, testblack), "the outline filled its interior");
SDL_DestroySurface(shot);
shot = NULL;
// The filled form covers the interior as well.
CATCH(errctx, clear_target());
TEST_EXPECT_OK(errctx, akgl_draw_filled_rect(akgl_renderer, &box, testred), "filling a rectangle");
shot = SDL_RenderReadPixels(akgl_renderer->sdl_renderer, NULL);
FAIL_ZERO_BREAK(errctx, shot, AKGL_ERR_SDL, "%s", SDL_GetError());
TEST_ASSERT(errctx, pixel_is(shot, 16, 16, testred), "the fill left its interior empty");
TEST_ASSERT(errctx, pixel_is(shot, 8, 8, testred), "the fill missed its top left corner");
TEST_ASSERT(errctx, pixel_is(shot, 24, 24, testblack),
"the fill ran one pixel past its bottom right corner");
TEST_EXPECT_STATUS(errctx, AKERR_NULLPOINTER, akgl_draw_rect(NULL, &box, testred),
"outlining through a NULL backend");
TEST_EXPECT_STATUS(errctx, AKERR_NULLPOINTER, akgl_draw_rect(akgl_renderer, NULL, testred),
"outlining a NULL rectangle");
TEST_EXPECT_STATUS(errctx, AKERR_NULLPOINTER, akgl_draw_filled_rect(NULL, &box, testred),
"filling through a NULL backend");
TEST_EXPECT_STATUS(errctx, AKERR_NULLPOINTER, akgl_draw_filled_rect(akgl_renderer, NULL, testred),
"filling a NULL rectangle");
} CLEANUP {
if ( shot != NULL ) {
SDL_DestroySurface(shot);
}
} PROCESS(errctx) {
} FINISH(errctx, true);
SUCCEED_RETURN(errctx);
}
akerr_ErrorContext *test_draw_circle(void)
{
PREPARE_ERROR(errctx);
SDL_Surface *shot = NULL;
bool symmetric = true;
int x = 0;
int y = 0;
ATTEMPT {
CATCH(errctx, clear_target());
TEST_EXPECT_OK(errctx, akgl_draw_circle(akgl_renderer, 32.0f, 32.0f, 10.0f, testred),
"drawing a circle");
shot = SDL_RenderReadPixels(akgl_renderer->sdl_renderer, NULL);
FAIL_ZERO_BREAK(errctx, shot, AKGL_ERR_SDL, "%s", SDL_GetError());
// The four axis points are exact for any correct midpoint circle.
TEST_ASSERT(errctx, pixel_is(shot, 42, 32, testred), "the circle is missing its rightmost pixel");
TEST_ASSERT(errctx, pixel_is(shot, 22, 32, testred), "the circle is missing its leftmost pixel");
TEST_ASSERT(errctx, pixel_is(shot, 32, 42, testred), "the circle is missing its bottom pixel");
TEST_ASSERT(errctx, pixel_is(shot, 32, 22, testred), "the circle is missing its top pixel");
// It is an outline, not a disc.
TEST_ASSERT(errctx, pixel_is(shot, 32, 32, testblack), "the circle filled its center");
// ...and nothing lands outside the radius.
TEST_ASSERT(errctx, pixel_is(shot, 43, 32, testred) == false,
"the circle drew a pixel one past its radius");
// Every plotted pixel has a mirror in the other three quadrants. The
// circle is drawn one octant at a time and reflected seven ways, so a
// sign error in any single reflection breaks this and nothing else --
// the four axis points above stay put either way.
for ( y = 22; y <= 42; y++ ) {
for ( x = 22; x <= 42; x++ ) {
if ( !pixel_is(shot, x, y, testred) ) {
continue;
}
TEST_ASSERT_FLAG(symmetric, pixel_is(shot, 64 - x, y, testred));
TEST_ASSERT_FLAG(symmetric, pixel_is(shot, x, 64 - y, testred));
TEST_ASSERT_FLAG(symmetric, pixel_is(shot, 64 - x, 64 - y, testred));
}
}
TEST_ASSERT(errctx, symmetric == true,
"the circle is not symmetric about its center; an octant is reflected wrong");
SDL_DestroySurface(shot);
shot = NULL;
// A zero radius is the degenerate case, not an error: one pixel.
CATCH(errctx, clear_target());
TEST_EXPECT_OK(errctx, akgl_draw_circle(akgl_renderer, 5.0f, 5.0f, 0.0f, testred),
"drawing a circle of radius zero");
shot = SDL_RenderReadPixels(akgl_renderer->sdl_renderer, NULL);
FAIL_ZERO_BREAK(errctx, shot, AKGL_ERR_SDL, "%s", SDL_GetError());
TEST_ASSERT(errctx, pixel_is(shot, 5, 5, testred),
"a circle of radius zero did not plot its center");
TEST_EXPECT_STATUS(errctx, AKERR_OUTOFBOUNDS,
akgl_draw_circle(akgl_renderer, 5.0f, 5.0f, -1.0f, testred),
"drawing a circle of negative radius");
TEST_EXPECT_STATUS(errctx, AKERR_NULLPOINTER,
akgl_draw_circle(NULL, 5.0f, 5.0f, 4.0f, testred),
"drawing a circle through a NULL backend");
} CLEANUP {
if ( shot != NULL ) {
SDL_DestroySurface(shot);
}
} PROCESS(errctx) {
} FINISH(errctx, true);
SUCCEED_RETURN(errctx);
}
akerr_ErrorContext *test_draw_flood_fill(void)
{
PREPARE_ERROR(errctx);
SDL_Surface *shot = NULL;
SDL_FRect box;
ATTEMPT {
// A red box outline on black. Filling inside it must stay inside it,
// which is the whole contract of PAINT.
box.x = 10.0f;
box.y = 10.0f;
box.w = 20.0f;
box.h = 20.0f;
CATCH(errctx, clear_target());
CATCH(errctx, akgl_draw_rect(akgl_renderer, &box, testred));
TEST_EXPECT_OK(errctx, akgl_draw_flood_fill(akgl_renderer, 20, 20, testgreen),
"flooding the inside of a box");
shot = SDL_RenderReadPixels(akgl_renderer->sdl_renderer, NULL);
FAIL_ZERO_BREAK(errctx, shot, AKGL_ERR_SDL, "%s", SDL_GetError());
TEST_ASSERT(errctx, pixel_is(shot, 20, 20, testgreen), "the seed pixel was not filled");
TEST_ASSERT(errctx, pixel_is(shot, 11, 11, testgreen),
"the fill did not reach the top left of the interior");
TEST_ASSERT(errctx, pixel_is(shot, 28, 28, testgreen),
"the fill did not reach the bottom right of the interior");
TEST_ASSERT(errctx, pixel_is(shot, 10, 10, testred), "the fill overwrote the boundary");
TEST_ASSERT(errctx, pixel_is(shot, 20, 10, testred), "the fill overwrote the top edge");
TEST_ASSERT(errctx, pixel_is(shot, 20, 5, testblack), "the fill leaked outside the box");
TEST_ASSERT(errctx, pixel_is(shot, 40, 40, testblack),
"the fill leaked into the rest of the target");
SDL_DestroySurface(shot);
shot = NULL;
// Filling a region that is already the requested color changes nothing
// and is not an error.
TEST_EXPECT_OK(errctx, akgl_draw_flood_fill(akgl_renderer, 20, 20, testgreen),
"flooding a region that is already that color");
shot = SDL_RenderReadPixels(akgl_renderer->sdl_renderer, NULL);
FAIL_ZERO_BREAK(errctx, shot, AKGL_ERR_SDL, "%s", SDL_GetError());
TEST_ASSERT(errctx, pixel_is(shot, 20, 20, testgreen),
"refilling a region disturbed it");
TEST_ASSERT(errctx, pixel_is(shot, 10, 10, testred),
"refilling a region disturbed its boundary");
SDL_DestroySurface(shot);
shot = NULL;
// Flooding the outside reaches every pixel that is not the box.
TEST_EXPECT_OK(errctx, akgl_draw_flood_fill(akgl_renderer, 0, 0, testgreen),
"flooding the area around a box");
shot = SDL_RenderReadPixels(akgl_renderer->sdl_renderer, NULL);
FAIL_ZERO_BREAK(errctx, shot, AKGL_ERR_SDL, "%s", SDL_GetError());
TEST_ASSERT(errctx, pixel_is(shot, 0, 0, testgreen), "the seed pixel was not filled");
TEST_ASSERT(errctx, pixel_is(shot, TEST_TARGET_SIZE - 1, TEST_TARGET_SIZE - 1, testgreen),
"the fill did not reach the far corner of the target");
TEST_ASSERT(errctx, pixel_is(shot, 10, 10, testred),
"the fill from outside overwrote the boundary");
TEST_EXPECT_STATUS(errctx, AKERR_OUTOFBOUNDS,
akgl_draw_flood_fill(akgl_renderer, -1, 0, testred),
"flooding from a seed left of the target");
TEST_EXPECT_STATUS(errctx, AKERR_OUTOFBOUNDS,
akgl_draw_flood_fill(akgl_renderer, 0, TEST_TARGET_SIZE, testred),
"flooding from a seed below the target");
TEST_EXPECT_STATUS(errctx, AKERR_NULLPOINTER,
akgl_draw_flood_fill(NULL, 0, 0, testred),
"flooding through a NULL backend");
} CLEANUP {
if ( shot != NULL ) {
SDL_DestroySurface(shot);
}
} PROCESS(errctx) {
} FINISH(errctx, true);
SUCCEED_RETURN(errctx);
}
akerr_ErrorContext *test_draw_copy_and_paste_region(void)
{
PREPARE_ERROR(errctx);
SDL_Surface *shot = NULL;
SDL_Surface *saved = NULL;
SDL_Surface *reused = NULL;
SDL_Rect region;
SDL_FRect box;
ATTEMPT {
// Put something recognisable in the top left corner and save it.
box.x = 0.0f;
box.y = 0.0f;
box.w = 8.0f;
box.h = 8.0f;
CATCH(errctx, clear_target());
CATCH(errctx, akgl_draw_filled_rect(akgl_renderer, &box, testred));
region.x = 0;
region.y = 0;
region.w = 8;
region.h = 8;
TEST_EXPECT_OK(errctx, akgl_draw_copy_region(akgl_renderer, &region, &saved),
"saving a region of the target");
TEST_ASSERT(errctx, saved != NULL, "akgl_draw_copy_region did not allocate a surface");
TEST_ASSERT(errctx, saved->w == 8 && saved->h == 8,
"the saved surface is %dx%d, expected 8x8", saved->w, saved->h);
// Wipe the screen and put it back somewhere else.
CATCH(errctx, clear_target());
TEST_EXPECT_OK(errctx, akgl_draw_paste_region(akgl_renderer, saved, 32.0f, 32.0f),
"pasting a saved region");
shot = SDL_RenderReadPixels(akgl_renderer->sdl_renderer, NULL);
FAIL_ZERO_BREAK(errctx, shot, AKGL_ERR_SDL, "%s", SDL_GetError());
TEST_ASSERT(errctx, pixel_is(shot, 32, 32, testred),
"the pasted region did not land at its destination");
TEST_ASSERT(errctx, pixel_is(shot, 39, 39, testred),
"the pasted region is smaller than what was saved");
TEST_ASSERT(errctx, pixel_is(shot, 40, 40, testblack),
"the pasted region is larger than what was saved");
TEST_ASSERT(errctx, pixel_is(shot, 0, 0, testblack),
"pasting also redrew the region at its original position");
SDL_DestroySurface(shot);
shot = NULL;
// A surface the caller already owns is reused rather than replaced, so
// saving the same region repeatedly does not churn allocations.
reused = SDL_CreateSurface(8, 8, SDL_PIXELFORMAT_RGBA32);
FAIL_ZERO_BREAK(errctx, reused, AKGL_ERR_SDL, "%s", SDL_GetError());
region.x = 32;
region.y = 32;
TEST_EXPECT_OK(errctx, akgl_draw_copy_region(akgl_renderer, &region, &reused),
"saving into a caller-owned surface");
TEST_ASSERT(errctx, pixel_is(reused, 0, 0, testred),
"the caller-owned surface did not receive the region");
// Wrong-sized destinations and regions off the edge of the target are
// refused rather than silently clipped.
region.w = 4;
TEST_EXPECT_STATUS(errctx, AKERR_OUTOFBOUNDS,
akgl_draw_copy_region(akgl_renderer, &region, &reused),
"saving into a destination of the wrong size");
region.x = TEST_TARGET_SIZE - 4;
region.y = 0;
region.w = 8;
region.h = 8;
TEST_EXPECT_STATUS(errctx, AKERR_OUTOFBOUNDS,
akgl_draw_copy_region(akgl_renderer, &region, &reused),
"saving a region that runs off the right edge");
region.x = 0;
region.w = 0;
TEST_EXPECT_STATUS(errctx, AKERR_OUTOFBOUNDS,
akgl_draw_copy_region(akgl_renderer, &region, &reused),
"saving a region with no area");
TEST_EXPECT_STATUS(errctx, AKERR_NULLPOINTER,
akgl_draw_copy_region(NULL, &region, &reused),
"saving through a NULL backend");
TEST_EXPECT_STATUS(errctx, AKERR_NULLPOINTER,
akgl_draw_copy_region(akgl_renderer, NULL, &reused),
"saving a NULL region");
TEST_EXPECT_STATUS(errctx, AKERR_NULLPOINTER,
akgl_draw_copy_region(akgl_renderer, &region, NULL),
"saving into a NULL destination");
TEST_EXPECT_STATUS(errctx, AKERR_NULLPOINTER,
akgl_draw_paste_region(NULL, saved, 0.0f, 0.0f),
"pasting through a NULL backend");
TEST_EXPECT_STATUS(errctx, AKERR_NULLPOINTER,
akgl_draw_paste_region(akgl_renderer, NULL, 0.0f, 0.0f),
"pasting a NULL surface");
} CLEANUP {
if ( shot != NULL ) {
SDL_DestroySurface(shot);
}
if ( saved != NULL ) {
SDL_DestroySurface(saved);
}
if ( reused != NULL ) {
SDL_DestroySurface(reused);
}
} PROCESS(errctx) {
} FINISH(errctx, true);
SUCCEED_RETURN(errctx);
}
akerr_ErrorContext *test_draw_preserves_render_draw_color(void)
{
PREPARE_ERROR(errctx);
SDL_FRect box;
uint8_t r = 0;
uint8_t g = 0;
uint8_t b = 0;
uint8_t a = 0;
ATTEMPT {
box.x = 0.0f;
box.y = 0.0f;
box.w = 4.0f;
box.h = 4.0f;
// Drawing must not leave the renderer's color set to whatever it drew
// with, or the host's next SDL_RenderClear() paints the wrong color.
FAIL_ZERO_BREAK(
errctx,
SDL_SetRenderDrawColor(akgl_renderer->sdl_renderer, 0x11, 0x22, 0x33, 0x44),
AKGL_ERR_SDL,
"%s",
SDL_GetError());
CATCH(errctx, akgl_draw_point(akgl_renderer, 1.0f, 1.0f, testred));
CATCH(errctx, akgl_draw_line(akgl_renderer, 0.0f, 0.0f, 3.0f, 3.0f, testred));
CATCH(errctx, akgl_draw_rect(akgl_renderer, &box, testred));
CATCH(errctx, akgl_draw_filled_rect(akgl_renderer, &box, testred));
CATCH(errctx, akgl_draw_circle(akgl_renderer, 20.0f, 20.0f, 4.0f, testred));
FAIL_ZERO_BREAK(
errctx,
SDL_GetRenderDrawColor(akgl_renderer->sdl_renderer, &r, &g, &b, &a),
AKGL_ERR_SDL,
"%s",
SDL_GetError());
TEST_ASSERT(errctx, (r == 0x11) && (g == 0x22) && (b == 0x33) && (a == 0x44),
"drawing left the render draw color at %02x%02x%02x%02x, expected 11223344",
r, g, b, a);
} CLEANUP {
} PROCESS(errctx) {
} FINISH(errctx, true);
SUCCEED_RETURN(errctx);
}
akerr_ErrorContext *test_draw_backend_without_a_renderer(void)
{
PREPARE_ERROR(errctx);
akgl_RenderBackend empty;
SDL_Surface *saved = NULL;
SDL_Surface *scratch = NULL;
SDL_FRect box;
SDL_Rect region;
ATTEMPT {
// A backend that exists but was never given an SDL_Renderer. Every
// entry point has to say so rather than dereference it -- this is the
// state a host is in between allocating a backend and initializing it.
memset(&empty, 0x00, sizeof(akgl_RenderBackend));
box.x = 0.0f;
box.y = 0.0f;
box.w = 4.0f;
box.h = 4.0f;
region.x = 0;
region.y = 0;
region.w = 4;
region.h = 4;
TEST_EXPECT_STATUS(errctx, AKERR_NULLPOINTER,
akgl_draw_point(&empty, 0.0f, 0.0f, testred),
"plotting through an uninitialized backend");
TEST_EXPECT_STATUS(errctx, AKERR_NULLPOINTER,
akgl_draw_line(&empty, 0.0f, 0.0f, 1.0f, 1.0f, testred),
"drawing a line through an uninitialized backend");
TEST_EXPECT_STATUS(errctx, AKERR_NULLPOINTER,
akgl_draw_rect(&empty, &box, testred),
"outlining through an uninitialized backend");
TEST_EXPECT_STATUS(errctx, AKERR_NULLPOINTER,
akgl_draw_filled_rect(&empty, &box, testred),
"filling through an uninitialized backend");
TEST_EXPECT_STATUS(errctx, AKERR_NULLPOINTER,
akgl_draw_circle(&empty, 4.0f, 4.0f, 2.0f, testred),
"drawing a circle through an uninitialized backend");
TEST_EXPECT_STATUS(errctx, AKERR_NULLPOINTER,
akgl_draw_flood_fill(&empty, 0, 0, testred),
"flooding through an uninitialized backend");
TEST_EXPECT_STATUS(errctx, AKERR_NULLPOINTER,
akgl_draw_copy_region(&empty, &region, &saved),
"saving through an uninitialized backend");
TEST_ASSERT(errctx, saved == NULL,
"a refused save still wrote something to the destination");
scratch = SDL_CreateSurface(4, 4, SDL_PIXELFORMAT_RGBA32);
FAIL_ZERO_BREAK(errctx, scratch, AKGL_ERR_SDL, "%s", SDL_GetError());
TEST_EXPECT_STATUS(errctx, AKERR_NULLPOINTER,
akgl_draw_paste_region(&empty, scratch, 0.0f, 0.0f),
"pasting through an uninitialized backend");
} CLEANUP {
if ( saved != NULL ) {
SDL_DestroySurface(saved);
}
if ( scratch != NULL ) {
SDL_DestroySurface(scratch);
}
} PROCESS(errctx) {
} FINISH(errctx, true);
SUCCEED_RETURN(errctx);
}
int main(void)
{
PREPARE_ERROR(errctx);
SDL_SetHint(SDL_HINT_VIDEO_DRIVER, "dummy");
SDL_SetHint(SDL_HINT_AUDIO_DRIVER, "dummy");
SDL_SetHint(SDL_HINT_RENDER_DRIVER, "software");
ATTEMPT {
CATCH(errctx, akgl_error_init());
TEST_TRAP_UNHANDLED_ERRORS();
akgl_renderer = &akgl_default_renderer;
FAIL_ZERO_BREAK(
errctx,
SDL_Init(SDL_INIT_VIDEO),
AKGL_ERR_SDL,
"Couldn't initialize SDL: %s",
SDL_GetError());
FAIL_ZERO_BREAK(
errctx,
SDL_CreateWindowAndRenderer(
"net/aklabs/libakgl/test_draw",
TEST_TARGET_SIZE,
TEST_TARGET_SIZE,
0,
&akgl_window,
&akgl_renderer->sdl_renderer),
AKGL_ERR_SDL,
"Couldn't create window/renderer: %s",
SDL_GetError());
CATCH(errctx, test_draw_point());
CATCH(errctx, test_draw_line());
CATCH(errctx, test_draw_rects());
CATCH(errctx, test_draw_circle());
CATCH(errctx, test_draw_flood_fill());
CATCH(errctx, test_draw_copy_and_paste_region());
CATCH(errctx, test_draw_preserves_render_draw_color());
CATCH(errctx, test_draw_backend_without_a_renderer());
} CLEANUP {
SDL_Quit();
} PROCESS(errctx) {
} FINISH_NORETURN(errctx);
}
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