opengl: More work on making line drawing match software renderer.
--HG--
extra : rebase_source : aa0f94872dc44a88e4f344308f82d0ee6b9905cd
diff --git a/src/render/opengl/SDL_render_gl.c b/src/render/opengl/SDL_render_gl.c
index eb9d790..514ca27 100644
--- a/src/render/opengl/SDL_render_gl.c
+++ b/src/render/opengl/SDL_render_gl.c
@@ -914,9 +914,9 @@
const GLfloat yend = verts[3];
if (ystart == yend) { /* horizontal line */
- verts[2] += (xend > xstart) ? 1.0f : -1.0f;
+ verts[(xend > xstart) ? 2 : 0] += 1.0f;
} else if (xstart == xend) { /* vertical line */
- verts[3] += (yend > ystart) ? 1.0f : -1.0f;
+ verts[(yend > ystart) ? 3 : 1] += 1.0f;
} else { /* bump a pixel in the direction we are moving in. */
const GLfloat deltax = xend - xstart;
const GLfloat deltay = yend - ystart;
diff --git a/src/render/opengles/SDL_render_gles.c b/src/render/opengles/SDL_render_gles.c
index e6350f0..49878c8 100644
--- a/src/render/opengles/SDL_render_gles.c
+++ b/src/render/opengles/SDL_render_gles.c
@@ -587,9 +587,9 @@
const GLfloat yend = verts[3];
if (ystart == yend) { /* horizontal line */
- verts[2] += (xend > xstart) ? 1.0f : -1.0f;
+ verts[(xend > xstart) ? 2 : 0] += 1.0f;
} else if (xstart == xend) { /* vertical line */
- verts[3] += (yend > ystart) ? 1.0f : -1.0f;
+ verts[(yend > ystart) ? 3 : 1] += 1.0f;
} else { /* bump a pixel in the direction we are moving in. */
const GLfloat deltax = xend - xstart;
const GLfloat deltay = yend - ystart;
diff --git a/src/render/opengles2/SDL_render_gles2.c b/src/render/opengles2/SDL_render_gles2.c
index f0801ab..20743fe 100644
--- a/src/render/opengles2/SDL_render_gles2.c
+++ b/src/render/opengles2/SDL_render_gles2.c
@@ -811,9 +811,9 @@
const GLfloat yend = verts[3];
if (ystart == yend) { /* horizontal line */
- verts[2] += (xend > xstart) ? 1.0f : -1.0f;
+ verts[(xend > xstart) ? 2 : 0] += 1.0f;
} else if (xstart == xend) { /* vertical line */
- verts[3] += (yend > ystart) ? 1.0f : -1.0f;
+ verts[(yend > ystart) ? 3 : 1] += 1.0f;
} else { /* bump a pixel in the direction we are moving in. */
const GLfloat deltax = xend - xstart;
const GLfloat deltay = yend - ystart;