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[gl] Constrain image sources to max texture size

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This commit is contained in:
Chris Wilson 2009-05-22 23:44:27 +01:00
parent 1ae5942a3a
commit 911482e5ae
2 changed files with 21 additions and 0 deletions
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2
src/cairo-gl-private.h
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@ -65,6 +65,8 @@ struct _cairo_gl_context {
cairo_mutex_t mutex; /* needed? */
GLuint dummy_tex;
GLint max_framebuffer_size;
GLint max_texture_size;
cairo_gl_surface_t *current_target;

19
src/cairo-gl-surface.c
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@ -130,6 +130,11 @@ _cairo_gl_context_init (cairo_gl_context_t *ctx)
glTexImage2D (GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0,
GL_RGBA, GL_UNSIGNED_BYTE, NULL);
ctx->max_framebuffer_size = 0;
glGetIntegerv (GL_MAX_RENDERBUFFER_SIZE, &ctx->max_framebuffer_size);
ctx->max_texture_size = 0;
glGetIntegerv (GL_MAX_TEXTURE_SIZE, &ctx->max_texture_size);
return CAIRO_STATUS_SUCCESS;
}
@ -459,6 +464,9 @@ cairo_gl_surface_create (cairo_gl_context_t *ctx,
if (ctx->status)
return _cairo_surface_create_in_error (ctx->status);
if (width > ctx->max_framebuffer_size || height > ctx->max_framebuffer_size)
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_SIZE));
surface = calloc (1, sizeof (cairo_gl_surface_t));
if (unlikely (surface == NULL))
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
@ -584,6 +592,12 @@ _cairo_gl_surface_create_similar (void *abstract_surface,
assert (CAIRO_CONTENT_VALID (content));
if (width > surface->ctx->max_framebuffer_size ||
height > surface->ctx->max_framebuffer_size)
{
return NULL;
}
if (width < 1)
width = 1;
if (height < 1)
@ -946,6 +960,11 @@ _cairo_gl_pattern_image_texture_setup (cairo_gl_composite_operand_t *operand,
return CAIRO_INT_STATUS_UNSUPPORTED;
image_surface = (cairo_image_surface_t *)surface_pattern->surface;
if (image_surface->width > dst->ctx->max_texture_size ||
image_surface->height > dst->ctx->max_texture_size)
{
return CAIRO_INT_STATUS_UNSUPPORTED;
}
/* The textures we create almost always has appropriate alpha channel
* contents. But sometimes GL sucks at image specification and we end up